A 400 kg rocket sled is coasting at 20 m/s. It then turns on its rocket engines for 4.0 s, with a thrust of 800 N. What is its final speed? O A. 30m/s O B. 25m/s OC. 18m/s O D. 28m/s O E. None of the above

A 400 kg rocket sled is coasting at 20 m/s. It then turns on its rocket engines for 4.0 s, with a thrust of 800 N. What is its final speed? O A. 30m/s O B. 25m/s OC. 18m/s O D. 28m/s O E. None of the above

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter9: Linear Momentum And Collisions

Section: Chapter Questions

Problem 80P: How much fuel would be needed for a 1000-kg rocket (this is its mass with no fuel) to take off from...

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Question

A 400 kg rocket sled is coasting at 20 m/s. It then turns on its rocket engines for 4.0 s, with a thrust of 800 N. What is its final speed?
А. 30m/s
В. 25m/s
C. 18m/s
D. 28m/s
E. None of the above

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